diketahui dua fungsi f(x) = 2x + 1 dan g(x)= x^+2x+2 tentukan (f•g)(x)

jawab

f(x) = 2x+1
g(x)= x² + 2x + 2

(fog)(x) = f { g(x)} = f ( x² + 2x + 2)
= 2 (x² + 2x  + 2) + 1
= 2x² + 4x + 4 + 1
= 2x² + 4x + 5